:root {
  --bg: #f8fafb;
  --bg-dark: #0c1f2e;
  --bg-card: #ffffff;
  --fg: #1a2b3c;
  --fg-muted: #5a6b7c;
  --fg-light: #8a96a3;
  --accent: #0066cc;
  --accent-soft: #e6f0fa;
  --accent-deep: #003d7a;
  --teal: #0d9488;
  --teal-soft: #e6f7f5;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 12px;
  --radius-sm: 8px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* NAV */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(248, 250, 251, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: white;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: -0.5px;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--fg);
  letter-spacing: -0.5px;
}

.nav-tagline {
  font-size: 13px;
  color: var(--fg-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  font-weight: 500;
}

/* HERO */
.hero {
  position: relative;
  padding: 160px 32px 100px;
  overflow: hidden;
}

.hero-inner {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -2px;
  color: var(--fg);
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 19px;
  line-height: 1.65;
  color: var(--fg-muted);
  max-width: 680px;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 32px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -1px;
}

.stat-label {
  font-size: 13px;
  color: var(--fg-light);
  margin-top: 4px;
  display: block;
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: var(--border);
}

.hero-gradient {
  position: absolute;
  top: -200px;
  right: -300px;
  width: 900px;
  height: 900px;
  background: radial-gradient(circle, rgba(0, 102, 204, 0.06) 0%, rgba(13, 148, 136, 0.04) 40%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}

/* PROBLEM */
.problem {
  padding: 120px 32px;
  background: var(--bg-dark);
  color: white;
}

.problem-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--teal);
  margin-bottom: 16px;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 56px;
  max-width: 700px;
  color: white;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.problem-card {
  padding: 36px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  transition: background 0.2s;
}

.problem-card:hover {
  background: rgba(255,255,255,0.07);
}

.problem-icon {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--teal);
  margin-bottom: 16px;
  opacity: 0.8;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: white;
}

.problem-card p {
  font-size: 15px;
  line-height: 1.6;
  color: rgba(255,255,255,0.6);
}

/* FEATURES */
.features {
  padding: 120px 32px;
}

.features-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.features h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 56px;
  color: var(--fg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-block {
  padding: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.feature-block:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(0, 102, 204, 0.08);
}

.feature-large {
  grid-column: span 2;
}

.feature-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--teal-soft);
  color: var(--teal);
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.feature-block h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--fg);
}

.feature-block p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--fg-muted);
}

/* NETWORK */
.network {
  padding: 120px 32px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--accent-soft) 100%);
}

.network-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.network h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 36px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 20px;
  color: var(--fg);
}

.network-desc {
  font-size: 16px;
  line-height: 1.65;
  color: var(--fg-muted);
  margin-bottom: 40px;
}

.network-benefits {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.benefit {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.benefit-marker {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  margin-top: 8px;
  flex-shrink: 0;
}

.benefit strong {
  display: block;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--fg);
}

.benefit p {
  font-size: 14px;
  line-height: 1.55;
  color: var(--fg-muted);
}

.network-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  width: 100%;
  max-width: 360px;
}

.node {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  text-align: center;
  border: 1px solid var(--border);
  transition: transform 0.2s;
}

.node:hover {
  transform: scale(1.05);
}

.node-site {
  background: white;
  color: var(--fg-muted);
}

.node-bridge {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.2);
}

.node-sponsor {
  background: var(--teal-soft);
  color: var(--teal);
  border-color: var(--teal);
}

/* CLOSING */
.closing {
  padding: 140px 32px;
  text-align: center;
  background: var(--bg-dark);
  color: white;
}

.closing-inner {
  max-width: 780px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
  color: white;
}

.closing-sub {
  font-size: 18px;
  line-height: 1.65;
  color: rgba(255,255,255,0.6);
  margin-bottom: 40px;
}

.closing-vision {
  font-size: 14px;
  color: rgba(255,255,255,0.35);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 500;
}

/* FOOTER */
.footer {
  padding: 32px;
  background: var(--bg-dark);
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  color: rgba(255,255,255,0.6);
}

.footer-logo {
  width: 28px;
  height: 28px;
  font-size: 11px;
  background: rgba(255,255,255,0.1);
}

.footer-copy {
  font-size: 13px;
  color: rgba(255,255,255,0.3);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .nav-tagline {
    display: none;
  }

  .hero {
    padding: 120px 20px 60px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
    padding: 24px;
    align-items: flex-start;
  }

  .stat-divider {
    width: 100%;
    height: 1px;
  }

  .problem {
    padding: 80px 20px;
  }

  .problem-grid {
    grid-template-columns: 1fr;
  }

  .features {
    padding: 80px 20px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .feature-large {
    grid-column: span 1;
  }

  .network {
    padding: 80px 20px;
  }

  .network-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .closing {
    padding: 80px 20px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}
/* =====================
   BUTTONS
   ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  letter-spacing: -0.2px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 2px 8px rgba(0, 102, 204, 0.25);
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-deep);
  box-shadow: 0 4px 16px rgba(0, 102, 204, 0.35);
  transform: translateY(-1px);
}

.btn-secondary {
  background: white;
  color: var(--fg);
  border: 1.5px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.1);
  transform: translateY(-1px);
}

.btn-teal {
  background: var(--teal);
  color: white;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.25);
}
.btn-teal:hover:not(:disabled) {
  background: #0b8277;
  box-shadow: 0 4px 16px rgba(13, 148, 136, 0.35);
  transform: translateY(-1px);
}

.btn-nav {
  background: var(--accent);
  color: white;
  padding: 10px 20px;
  font-size: 14px;
  border-radius: var(--radius-sm);
}
.btn-nav:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
}

.btn-outline-accent {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
  padding: 12px 24px;
  font-size: 14px;
}
.btn-outline-accent:hover {
  background: var(--accent-soft);
}

.btn-full {
  width: 100%;
}

/* Hero CTAs */
.hero-ctas {
  display: flex;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

/* =====================
   NAV ACTIONS
   ===================== */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-link:hover {
  color: var(--fg);
}

/* =====================
   AUDIENCE SECTIONS
   ===================== */
.audience-section {
  padding: 120px 32px;
}

.audience-sites {
  background: var(--bg);
  border-top: 1px solid var(--border-light);
}

.audience-sponsors {
  background: linear-gradient(180deg, var(--accent-soft) 0%, var(--bg) 100%);
}

.audience-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 80px;
  align-items: start;
}

.audience-label-block h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 16px;
  color: var(--fg);
}

.audience-desc {
  font-size: 16px;
  line-height: 1.65;
  color: var(--fg-muted);
  margin-bottom: 32px;
}

.audience-benefits-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.audience-benefit-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.audience-benefit-card:hover {
  border-color: var(--teal);
  box-shadow: 0 4px 16px rgba(13, 148, 136, 0.08);
}

.audience-sponsors .audience-benefit-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 16px rgba(0, 102, 204, 0.08);
}

.aud-icon {
  width: 40px;
  height: 40px;
  background: var(--teal-soft);
  color: var(--teal);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.aud-icon-accent {
  background: var(--accent-soft);
  color: var(--accent);
}

.audience-benefit-card h3 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--fg);
}

.audience-benefit-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg-muted);
}

.aud-highlight {
  background: var(--teal-soft);
  border-color: var(--teal);
  grid-column: span 2;
}

.aud-pricing-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--teal);
  color: white;
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sponsor-pricing-card {
  background: var(--accent-soft);
  border-color: var(--accent);
  grid-column: span 2;
}

.sponsor-pricing-header {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent);
  color: white;
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* =====================
   CONTACT / CTA SECTION
   ===================== */
.contact-section {
  padding: 120px 32px;
  background: var(--bg-dark);
  color: white;
}

.contact-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.contact-header {
  margin-bottom: 64px;
  max-width: 600px;
}

.contact-section .section-label {
  color: var(--teal);
}

.contact-header h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 16px;
  color: white;
}

.contact-sub {
  font-size: 17px;
  line-height: 1.65;
  color: rgba(255,255,255,0.6);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}

/* FORM */
.contact-form-wrap {
  position: relative;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.3px;
}

.label-optional {
  font-weight: 400;
  opacity: 0.5;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 15px;
  color: white;
  transition: border-color 0.2s, background 0.2s;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,0.3);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--teal);
  background: rgba(255,255,255,0.1);
}

.form-group select option {
  background: #1a2b3c;
  color: white;
}

.form-group textarea {
  resize: vertical;
  min-height: 110px;
}

/* Success state */
.contact-success {
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 80px 40px;
  gap: 16px;
}

.contact-success h3 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: white;
}

.contact-success p {
  color: rgba(255,255,255,0.6);
  font-size: 16px;
}

/* ASIDE */
.contact-aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.aside-card {
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.1);
}

.aside-sites {
  background: rgba(13, 148, 136, 0.12);
  border-color: rgba(13, 148, 136, 0.3);
}

.aside-sponsors {
  background: rgba(0, 102, 204, 0.12);
  border-color: rgba(0, 102, 204, 0.3);
}

.aside-label {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.aside-sites .aside-label {
  color: var(--teal);
}
.aside-sponsors .aside-label {
  color: #5ba3e0;
}

.aside-card p {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255,255,255,0.6);
  margin-bottom: 16px;
}

.aside-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.aside-list li {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  padding-left: 20px;
  position: relative;
}

.aside-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--teal);
  font-weight: 700;
}

.aside-sponsors .aside-list li::before {
  color: #5ba3e0;
}

/* =====================
   SCROLL ANIMATIONS
   ===================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* =====================
   RESPONSIVE ADDITIONS (new sections)
   ===================== */
@media (max-width: 1024px) {
  .audience-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-actions {
    display: none;
  }
  .hero-ctas {
    flex-direction: column;
    gap: 12px;
    margin-bottom: 40px;
  }
  .hero-ctas .btn {
    width: 100%;
    justify-content: center;
  }
  .audience-section {
    padding: 80px 20px;
  }
  .audience-benefits-grid {
    grid-template-columns: 1fr;
  }
  .aud-highlight,
  .sponsor-pricing-card {
    grid-column: span 1;
  }
  .contact-section {
    padding: 80px 20px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .contact-aside {
    display: none;
  }
}